#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,d,e,n;
    cin>>n;
    a=n%10;
    b=n/10%10;
    c=n/100%10;
    d=n/1000%10;
    e=n/10000;
    if(a==5||b==5||c==5||d==5||e==5){
    	cout<<a+b+c+d+e;	
    }else{
    	cout<<e*10000+d*1000+c*100+b*10+a;
    }
}
/**************************************************************
	Problem: 1659
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:24 ms
	Memory:2072 kb
****************************************************************/